Just because your spouse hasn't had any physical contact with someone doesn't mean he isn't cheating online. In fact, news website PRWeb.com reports that 2.5 percent of the married British population are members of Illicit Encounters, a website geared toward married people looking to have affairs. If you think your spouse is cheating, his behavior on the computer can tip you off to a problem. By paying attention to certain clues, you can catch him cheating using the very tool he uses to cheat.
Examine the Internet history on your spouse's computer, especially if it is a private laptop. Look for websites that your spouse may have visited that look like dating, pornography or chat sites. If possible, visit some of the sites to see what type of people frequent them. If the Internet history is empty, it could also alert you to a problem; your spouse may have deleted everything so you couldn't see what she's been up to online.
Install an Internet history tracker like IE History Tracker, K9 or Surf Logger to track your spouse's movements online, whether he remembers to delete them from his history or not. All programs will allow your spouse to erase the history from the browser, but will send you a report or allow you to access a report of the websites that have been visited. You're also able to set websites to be blocked.
Ask your spouse for her passwords to access a certain account, suggests dating website True.com. If she seems upset or tries to talk you out of seeing her emails, she could be guilty of infidelity via emails. Also, if she's recently changed passwords on accounts that you once had access to, it could be a sign of her hiding something. If you are able to access her emails, look through them briefly. If it seems as though she's deleted emails when she typically allows them to stay open, she may be trying to remove the evidence of her infidelity.
Watch how he uses the computer. If you walk in a room and he quickly powers down or turns away, he may be up to something, suggests private investigation firm the Custer Agency. Keep a close eye on how he acts when you are in the same room as his computer; he could act nervous or try to get you away from the computer because he doesn't want to be discovered.